In September, Hamilton typically sees daytime highs of 26.2°C and overnight lows around 12.8°C. Compared to the annual average high of 17.6°C, September runs +8.6°C.
September in Hamilton averages a daytime high of 26.2°C and an overnight low of 12.8°C.
September runs +8.6°C compared to Hamilton's annual average high of 17.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 26.2°C and cooler evenings around 12.8°C.